Keil qVision does not compile STM32F0xx

Hi, not very experienced with this. In my previous workplace this IDE "just worked", never had an issue that I remember. Now I'm the only one using this every now and then, and only just recently installed the Keil qVision for STM32. Tried something simple just with the ST's Discovery board, and tried to compile but is says : "failed to execute arm-none-eabi-gcc". And also arm-none-eabi-as. I have no idea what to do. Can anyone easily advice? I created the project with STM32CubeMX.